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4 + 16 + b =13
We simplify the equation to the form, which is simple to understand
4+16+b=13
We move all terms containing b to the left and all other terms to the right.
+1b=+13-4-16
We simplify left and right side of the equation.
+1b=-7
We divide both sides of the equation by 1 to get b.
b=-7
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